function ChangeImage(ImageName)
{
	var locationLargeImage = "";
	var extansion = "";
	var name = "";
	eval("locationLargeImage = document.images." + ImageName + ".src");
	extension = locationLargeImage.substring((locationLargeImage.length - 4))
	name = locationLargeImage.substring(0, (locationLargeImage.length - 4))
	locationLargeImage = name + "grande" + extension;
	document.images.Grande.src = locationLargeImage;
}